diff --git a/css/html_instruct_style.css b/css/html_instruct_style.css
index ad47a4e..b3a9e01 100644
--- a/css/html_instruct_style.css
+++ b/css/html_instruct_style.css
@@ -74,8 +74,16 @@
 
 .dark .chat .assistant-message {
     background-color: #374151;
+    border: 1px solid #4b5563;
 }
 
+.dark .chat .user-message {
+    background-color: #111827;
+    border: 1px solid #4b5563;
+}
+
+
+
 code {
     background-color: white !important;
 }